Climatology
This page presents Brunei Darussalam's climate context for the current climatology, 1991-2020, derived from observed, historical data. Information should be used to build a strong understanding of current climate conditions in order to appreciate future climate scenarios and projected change. You can visualize data for the current climatology through spatial variation, the seasonal cycle, or as a time series. Analysis is available for both annual and seasonal data. Data presentation defaults to national-scale aggregation, however sub-national data aggregations can be accessed by clicking within a country, on a sub-national unit. Other historical climatologies can be selected from the Time Period dropdown list.
Observed, historical data is produced by the Climatic Research Unit (CRU) of University of East Anglia. Data is presented at a 0.5º x 0.5º (50km x 50km) resolution.
Brunei Darussalam has an equatorial climate influenced by the monsoon systems known as northeast monsoon and southwest monsoon. The northeast monsoon season occurs from December to March and southwest monsoon season occurs from June to September. The two seasons are separated by two transitional periods known as inter-monsoon periods of which the first occurs in April and May, while the second period occurs in October and November. The country generally experiences wet conditions throughout the year with average annual rainfall of 3,000 millimetres (2010-2014). Being in an equatorial climate country, the temperature is hot throughout the year. The mean daily temperature is 28.04°C, with maximum mean of 32.4°C and minimum mean of 23.7°C (2010-2014).